I managed to salvage the stock hood insulation. It looks like crap underneath but the MLV (at least I think its mass loaded vinyl) was still in decent shape. I'm also starting to realize the sound insulation in these trucks is actually pretty good quality. Ideally this is installed with the hood facing up since the insulation is heavy and rips easily, but I wasn't about to pull the hood in order to do that. The trick was to have the new and old layers spread on the engine, then lowering the hood close enough to get the front edge attached. After that it hangs pretty easily and the rest of the snaps can be popped in. I haven't driven it yet to see if engine noise is any better but it sure looks better than it was.